fix parameter highlighting for VB

src/AddIns/BackendBindings/VBNetBinding/Project/Src/VBNetCompletionBinding.cs

@@ -67,7 +67,6 @@ namespace ICSharpCode.VBNetBinding
 						if (insightWindow != null) {
 							insightHandler.InitializeOpenedInsightWindow(editor, insightWindow);
 							insightHandler.HighlightParameter(insightWindow, 0);
-							insightWindow.CaretPositionChanged += delegate { Run(insightWindow, editor); };
 						}
 						return CodeCompletionKeyPressResult.Completed;
 					}
@@ -75,14 +74,8 @@ namespace ICSharpCode.VBNetBinding
 				case ',':
 					if (CodeCompletionOptions.InsightRefreshOnComma && CodeCompletionOptions.InsightEnabled) {
 						IInsightWindow insightWindow;
-						editor.Document.Insert(editor.Caret.Offset, ",");
-						if (insightHandler.InsightRefreshOnComma(editor, ch, out insightWindow)) {
-							if (insightWindow != null) {
-								insightHandler.HighlightParameter(insightWindow, GetArgumentIndex(editor) + 1);
-								insightWindow.CaretPositionChanged += delegate { Run(insightWindow, editor); };;
-							}
-						}
-						return CodeCompletionKeyPressResult.EatKey;
+						if (insightHandler.InsightRefreshOnComma(editor, ch, out insightWindow))
+							return CodeCompletionKeyPressResult.Completed;
 					}
 					break;
 				case '\n':
@@ -145,26 +138,6 @@ namespace ICSharpCode.VBNetBinding
 			return CodeCompletionKeyPressResult.None;
 		}
 		
-		void Run(IInsightWindow insightWindow, ITextEditor editor)
-		{
-			insightHandler.HighlightParameter(insightWindow, GetArgumentIndex(editor));
-		}
-		
-		static int GetArgumentIndex(ITextEditor editor)
-		{
-			ILexer lexer = ParserFactory.CreateLexer(SupportedLanguage.VBNet, editor.Document.CreateReader());
-			ExpressionFinder ef = new ExpressionFinder();
-			
-			Token t = lexer.NextToken();
-			
-			while (t.Kind != Tokens.EOF && t.Location < editor.Caret.Position) {
-				ef.InformToken(t);
-				t = lexer.NextToken();
-			}
-			
-			return ef.ActiveArgument;
-		}
-		
 		static bool IsTypeCharacter(char ch, char prevChar)
 		{
 			ch = char.ToUpperInvariant(ch);